Automatic sash-lock.



E. H. REMPE & P. M. ROSS.

AUTOMATIC SASH LOOK. I

APPLIOATION FILED JAN. 16, 1911.

1,023,442. Patented Apr. 16, 1912.

awe/Mm FIG. 3 {a v COLUMBIA PLANQORAPH C0.. WASHINGTON. D. c.

STATES PATNT EDWARD H. REMl-E AND FREDERICK M. ROSS, OF OAKLEY, OHIO.

AUTOMATIC SASI-I-LOCK.

To all whom it may concern Be it known that we, EDWARD H. REMPE and FREDERICK M. Ross, citizens of the United States of America, and residents of Oakley, county of Hamilton, and State of Ohio, have invented certain new and useful Improvements in Automatic Sash-Locks, of which the following is a specification.

This invention relates to window locks and has for an object to provide means for locking the upper and lower sash of a win.- dow together, which cannot be tampered with or unlocked from the outside.

A further object is to produce a window lock which will automatically move from a set to a locked position, when the window is closed.

These and other objects we attain by means of a device embodying the features herein described, and illustrated in the drawings accompanying this application and forming a part of it.

In the drawings, Figure 1 is a sectional view of a lock embodying our invention, shown in the set position, and in connection with a fragmental sectional View of the upper and lower sash of a window. Fig. 2 is a sectional view corresponding to Fig. 1, and showing the window sash closed and the lock locked. Fig. 3 is a sectional view corresponding to Figs. 1 and 2, and shows the lock in the release position, so that its bolt or latch can be automatically withdrawn from the keeper, as the window is opened.

The lock illustrated as an embodiment of our invention, consists of a pivotally mounted bolt or latch 4, a manually actuated lever or handle 5, for engaging the bolt, and for positively locking it in the locked position, and a keeper 6, which engages the end of the latch, when it is moved to the locked position. The handle 5 and the latch 4 are mounted within a casing 7, which is secured by any suitable means, such, for example, as screws,'to the top of the lower sash 8 of the window. The keeper 6 is secured to the bottom of the upper sash 9 of the window in such a position, that it is located immediately adjacent to the casing 7, when the window is closed. The latch 4 is pivotally mounted on a pin 11, which extends transversely across the casing 7, and is so located that the lower end of the latch projects through a slot formed in the rear face of the casing 7 and is adapted to swing from a set Specification of Letters Patent.

Application filed January 16, 1911.

Patented Apr. 16, 1912.

Serial No. 602,756.

position to an operative position, to engage a keeper pin 12, when one sash is moved relatively to the other sash to a closed posi tion. Latch 4, in the set position, contacts with the lower face 13 of the casing. A slot 14 is formed partially in the top and partially in the forward face of the keeper 6, and is of such width in the top face of the keeper, that the latch can move downwardly into it, when in the set position. The lower edge 15 of the slot 14 is preferably, but not necessarily, slightly beveled inwardly with reference to the keeper, and the lower end of the inner edge of the latch 4 is curved, so that it cooperates with the edge 15 to swing the latch 4 outwardly to the locked position, when the window sashes are moved to the closed position. The outer edge of the latch 4 is curved near the outer end to form a hook which is adapted to engage the keeper pin 12, when the latch is moved to the locked position. The inner end of the latch is provided with a knuckle 17, which terminates in an extension 17. The extension 17 is adapted to engage a notch 18 provided on the inner end of the handle 5, when the latch is moved to the locked position. The handle 5 is pivotally mounted on a pin 19, mounted in the casing 7, and projects through a slot formed in the forward face of the casing. The inner end of the handle is curved to form acam-face 20. which is so located that it engages the knuckle 17 when the latch is in the set position, and which terminates in the notch 18. The point of the cam face 20 which is at the greatest distance from the pivot 19, is at notch 18. The movement of handle 5 in a clockwise direction therefore does not move latch 4, when it is in its set position. As the latch. 4 is moved from the set to the locked position, by the edge 15 of the keeper 6, the inner edge of the latch slides along the cam-face 20, until the notch 18trips into engagement with the extension 17 and positively locks the latch in place.

When the latch is in place, it cannot be moved, unless released by the handle 5, since it is firmly held against turning about the pin 11 by three rigid points of support; to-wit, the pin 12, the edge 15 and the point of engagement between the recess 18 of the handle and the extension 17 of the latch. The engagement between the extension 17 and the notch 18, prevents a clockwise motion of the latch around the pin 11, and

the pin 12 prevents a contra-clockwise motion. Under these conditions, the upper and the lower sash are firmly locked together against relatively vertical motion, and they are also looked against relatively lateral motion, by the engagement of the curved end of the latch with the keeper pin 12, and, consequently, the lock cannot be tampered with, or unlocked, by inserting a knife blade, or other instrument, between the sash, from the outside of the window.

In releasing the latch 4:, or unlocking the window, the handle 5 is raised to a vertical. position, as shown in Fig. 3. Its center of gravity is so located, that it will remain in this vertical position, until tripped by the latch l. When the handle is in the release or vertical position, the extension 17 is free from the notch 18, and the window can be opened. The opening motion of either sash, will turn the latch about its mounting pin 11 and the pin 12 in leaving the end of the latch, will move it to the set position against the face 13. The cam-face 20 of the handle 5 is provided with an extension, so formed that the first movement of the latch from the locked toward the set position, causes the extension 17 to engage the extension of the cam 20 and to trip the handle and causes it to swing around its mounting pin from the vertical or release position to the set position. With this arrangement, the window can not be closed, without being automatically locked, since, as has been described, the opening motion of either sash, moves the latch 4 and the handle 5 to the set position, and since the set position of the latch cannot be disturbed by a manipulation of the handle 5.

to a locked position, and a pin mounted on said keeper for engaging said latch and cooperating with said handle for locking said latch in a locked position.

2. In a sash lock, the combination of a casing for the lower sash, a keeper for the upper sash, two journaled pins mounted in the casing, a latch mounted upon the forward journaled pin in the casing and hav ing a rearwardly extending projection, a handle mounted upon the other journaled pin in the casing having a cam face adjacent to the latch,. the lower edge of the cam face terminating in a notch which engages the rearward extension of the latch in its set position, a detaining pin within the keeper adapted to contact with the upper face of the latch in its set position and to pass the latch in its released position, and the keeper being adapted to engage the latch when the upper sash is being closed to move the latch to its set position.

EDWARD H. REMPE. FREDERICK M. ROSS.

Witnesses:

VVALTER F. MURRAY, H. THORNTON Boonn'r.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. C. 

